#!/bin/sh
#basic
a <b c>>d>e;f|g
cd x
exit
logout
#versatile
ls&ps
jobs
nice
wait 23
#advanced
aa&&bb||c
a|(b;c)
echo $HOME
echo a*b?[a-z]
a=b
#scripting
cat <<#here
document
#here
`pwd`
case $a in
a)	echo bb ;;
b)	echo aa ;;
esac
if [ a -eq b ] ; then aaa ; else ppp ; fi
while [ a ] ; do .... ; done
#bash
$(xxx ppp)
